Unable to upload .vhd file to Azure storage . I am getting an error Page blob size must be aligned to a 512-byte boundary.

Question

Page blob size must be aligned to a 512-byte boundary.

Answer 1

Hi Ashish Sharma,

you're encountering an issue when trying to upload a .vhd file to Azure storage, specifically with the error message about the "Page blob size must be aligned to a 512-byte boundary."

To resolve this issue, you should ensure that the Resize-VHD PowerShell cmdlet file meets this alignment requirement. If necessary, you may need to resize the VHD to comply with the 1 MB alignment as well, since Azure requires that the supported disk size should be 1 MB * N (for example, 102,401 MB). Note that Resize-VHD is not an Azure PowerShell cmdlet.

• To resolve the problem in Linux, use the qemu-img command.
  Uploaded VHD is not supported when you create a VM in Azure - Virtual Machines | Microsoft Learn

If you continue to experience issues, consider checking if the VHD is corrupted or not supported, as this could also lead to upload failures.

Rebuild the VHD: If you've confirmed that the alignment is correct and you still get the error, there could be a chance that the VHD is corrupted. In this case, it's best to rebuild the VHD from scratch.

For step-by-step guidance on preparing and uploading your VHD files, take a look at these links:

• Prepare a Windows VHD or VHDX to upload to Azure
• Bringing and creating Linux images in Azure

Hope the above suggestion helps! Please let us know do you have any further queries.

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